Title:
LEX SIGNAL TRACKING METHOD, POSITIONING SIGNAL RECEPTION METHOD, LEX SIGNAL TRACKING PROGRAM, POSITIONING SIGNAL RECEPTION PROGRAM, LEX SIGNAL TRACKER, POSITIONING SIGNAL RECEIVER, AND MOBILE TERMINAL
Document Type and Number:
WIPO Patent Application WO/2012/101935
Kind Code:
A1
Abstract:
[Problem] To provide a LEX signal tracking method for continuously tracking a LEX signal. [Solution] A LEX signal transmitted from a quasi-zenith satellite is demodulated (S101). A weekend-proximity notification signal (Snear) is generated based on the time of week obtained from the demodulated LEX signal. The state of a Long code generated during code correlation processing is analyzed (S102). If the 997,425th code state stored matches the analyzed code state (S103: Yes), a pulse signal (dplus) is generated (S104). If the generated pulse signal (dplus) is immediately after the detected weekend-proximity notification signal (Snear) (S105: Yes), the Long code is reset to the initial state (S106).
Inventors:
WANG DUN (JP)
KAWAI MASATO (JP)
KAWAI MASATO (JP)
Application Number:
PCT/JP2011/079295
Publication Date:
August 02, 2012
Filing Date:
December 19, 2011
Export Citation:
Assignee:
FURUNO ELECTRIC CO (JP)
WANG DUN (JP)
KAWAI MASATO (JP)
WANG DUN (JP)
KAWAI MASATO (JP)
International Classes:
G01S19/30; H04B1/7085
Other References:
WANG DUN ET AL.: "QZS-LEX Shingo Jushinki", GPS/GNSS SYMPOSIUM 2010, November 2011 (2011-11-01), pages 175 - 182
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Claims: